JP5535058B2 - Semi-plastic body cutting device - Google Patents

Description

  The present invention relates to a cutting device for cutting a semi-plastic body of ALC used in a manufacturing process of an ALC (lightweight cellular concrete) panel used for an outer wall material of a building.

  In the manufacture of an ALC panel, a raw material slurry is conventionally poured into a predetermined mold, and the mold is removed when it is solidified into a semi-plastic state with a predetermined hardness, and the ALC in the semi-plastic state (hereinafter also referred to as a semi-plastic body). In general, a method for obtaining an ALC panel having a predetermined size and shape by cutting into a predetermined size with a wire such as a piano wire and steam curing with an autoclave has been performed.

  When cutting with a wire, a cutting device is often used, and there is a wire fixed cutting type cutting device that cuts while relatively moving a wire and a semi-plastic body that are stretched between both support portions in a tension state. In particular, it has been used a lot. However, if the wire fixed by this method is only cut while being pressed against the semi-plastic body, the cut surface of the semi-plastic body is likely to be scraped, and it is often difficult to obtain a smooth cut surface. It was. The relative movement between the wire and the semi-plastic body means that the wire side is moved toward the semi-plastic body without moving the semi-plastic body side, or the semi-plastic body side is moved toward the wire without moving the wire side. It means to make it.

  Cut off of the cut surface not only remains on the surface of the ALC panel even after steam curing and impairs the appearance of the panel itself, but also when the panel is stored or moved, it is exposed to wind or the cut surface is rubbed. Or it may be scattered as powder when vibration is applied to the panel, which has been a problem in panel storage and construction sites. In addition, if the surface of the ALC panel is painted with the surface being rubbed, the rugged portion will remain as an uneven surface on the surface of the ALC panel after coating, so a large amount of paint is applied to impair the aesthetics of the ALC panel surface. It was necessary to prevent it.

  Therefore, in order to suppress such flaking, for example, as disclosed in Patent Documents 1 and 2, drums that respectively rotate are provided at positions facing each other across a cutting region where the semi-plastic body is cut. There has been proposed a method of cutting the semi-plastic body by moving the wire and the semi-plastic body relative to each other in the cutting direction while running the wire by drawing the wire and winding it on the other drum.

  Further, as in Patent Document 3, a support member is provided above and below the traveling path of the semi-plastic body, a plurality of pairs of wires are bridged between the both support members, and both support members are provided above and below. There has also been proposed a method of reciprocating up and down with an apparatus and pressing a semi-plastic body against the reciprocating wire to cut. This method is described as being able to smooth out periodic flaking that is likely to occur when the wire is cut while reciprocating in the direction of the wire.

JP 56-33295 A JP 2004-358597 A JP 2001-277233 A

  However, when the wire is run using both drums provided across the cutting region of the semi-plastic body as in Patent Documents 1 and 2, the rotation center axis of one drum and the rotation center axis of the other drum are Since they will be installed separately, usually the prime mover that drives them will also be installed separately. Therefore, there is a problem in that the energy consumption for rotational driving of these drums becomes inefficient and the manufacturing cost increases.

  Moreover, since the method of patent document 3 which cut | disconnects a semi-plastic body, reciprocating a wire to the linear direction needs to reciprocate to the up-down direction with the supporting member which supports several pairs of wires, an apparatus becomes large-scale. Become. Furthermore, in order to obtain a smoother cut surface, the faster the reciprocating cycle of the wire, the better. The longer the reciprocating stroke, the better. However, the method of Patent Document 3 is more practical in terms of manufacturing cost because the support member to be reciprocated becomes increasingly larger as the cycle of the reciprocating movement of the wire increases and the stroke length increases. No.

  This invention is made | formed in view of the said subject, and it aims at providing the cutting device of the semiplastic body excellent in energy consumption efficiency while being able to obtain a smooth cut surface.

  In order to achieve the above object, a semi-plastic body cutting device of the present invention is a cutting device that cuts a semi-plastic body by relatively moving the semi-plastic body and a wire, and is provided on a concentric shaft. A pair of rotating drums, a wire wound around both ends of the pair of rotating drums, and a wire drawn from one rotating drum of the pair of rotating drums. A folding pulley that turns back toward the drum, a positioning pulley that guides the drawn wire to a cutting region where the semi-plastic body is cut, and a tension applying mechanism that applies a predetermined tension to the drawn wire. It is said.

  According to the present invention, since the rotating drum from which the wire is drawn and the rotating drum from which the wire is wound are arranged on the concentric shafts, it is necessary to separately provide a rotation center shaft that supports both the rotating drums. In addition, only one drive mechanism for rotating both the rotating drums is required. As a result, the energy consumption for driving can be made efficient and the manufacturing cost can be reduced.

  Further, the rotational direction of the rotational force applied to the rotating drums by the tension acting on the traveling wire is opposite between the rotating drum side from which the wire is drawn and the rotating drum side from which the wire is wound. That is, the rotational moments due to the tension are substantially canceled with respect to the concentric shafts of these two rotating drums. Therefore, energy consumption for running the wire can be made more efficient, and the power of the prime mover of the drive mechanism can be small. Further, since the operation of the prime mover basically requires only normal rotation and reverse rotation, the control system of the prime mover can be simplified.

It is a front view which shows a mode that the cutting device of the semi-plastic body which concerns on one Embodiment of this invention is mounted in one frame. It is a side view when a cutting device is seen from the dashed-dotted line AA shown in FIG. FIG. 2 is a schematic perspective view of an arbitrary one of the eight cutting devices illustrated in FIG. 1.

  Hereinafter, an embodiment of a semi-plastic body cutting device according to the present invention will be described with reference to the drawings. FIG. 1 illustrates a case where eight semi-plastic cutting devices 20 according to an embodiment of the present invention are mounted in parallel on one frame 30 having a substantially rectangular shape in front view. However, since all of these eight cutting devices 20 have substantially the same structure, in the following description, only one of these eight cutting devices 20 will be described.

  The cutting device 20 includes a pair of rotating drums 1 and 2 provided on concentric shafts, a wire W wound around the pair of rotating drums 1 and 2 at both ends, and a pair of A folding pulley 12 that turns back the wire W drawn from one of the rotary drums 1 and 2 toward the other rotary drum, and the drawn wire W to a cutting region where the semi-plastic body is cut. Positioning pulleys 10 and 11 and a tension applying mechanism such as a tension pulley 9 that applies a predetermined tension to the drawn wire W are provided.

  Since the pair of rotary drums 1 and 2 and the folding pulley 12 are rotatably supported by the upper horizontal bar 30a and the lower horizontal bar 30b of the frame 30, respectively, the upper horizontal bar 30a and the lower horizontal bar 30b The wire W before being folded back by the folding pulley 12 and the wire W after being folded back can run in parallel and in opposite directions to the cutting region of the semi-plastic body M defined therebetween. In this state, the semi-plastic body M can be cut into a predetermined dimension by passing the semi-plastic body M through the cutting region and pressing the wire W running on the semi-plastic body M.

  The cutting device 20 having the above configuration will be described in detail below. A pair of rotating drums 1 and 2 on which the wire W is drawn and wound respectively are attached to one end of the concentric shaft 3 so as to rotate on the concentric shaft. The concentric shaft 3 is rotatably supported by the upper horizontal bar 30a of the frame 30 so that the rotation center line thereof is directed in a direction perpendicular to the paper surface of FIG.

  It is preferable that the pair of rotating drums 1 and 2 is detachably attached to the concentric shaft 3. Thus, if a pair of rotating drums 1 and 2 in a state where all the wires W are wound around one rotating drum is prepared as a spare, the pair of rotating drums 1 and 2 is attached to the cutting device 20. The cutting operation can be started immediately. In particular, as shown in FIG. 1, when a plurality of cutting devices 20 are mounted on one frame body 30, when it is necessary to replace the wire W of the cutting device 20, only the rotating drum is replaced. Therefore, the wire W replacement work time can be greatly shortened.

  The structure for making the rotating drum attachable / detachable is not particularly limited. For example, in the concentric shaft 3, at least one groove portion extending in the axial direction is formed on the shaft surface from one end portion to a position where the rotating drum is attached. It is only necessary to provide a protrusion that fits in the groove on the inner surface of the center hole of the rotating drum through which the concentric shaft 3 is inserted. In addition, a cap-like stopper screwed to the one end is attached to one end of the concentric shaft 3, or a hole penetrating in the diametrical direction is drilled in the one end of the concentric shaft 3, and a split pin or the like is provided there. It is more preferable that the rotating drum is not detached from the concentric shaft 3 during operation, for example, by mounting.

  In the vicinity of the pair of rotating drums 1 and 2, a prime mover 4 such as a motor that serves as a power source for rotational driving of the rotating drums 1 and 2 is provided. A belt pulley 4 a is fitted on the spindle of the prime mover 4, and the belt pulley 4 a and a belt pulley 3 a fitted on the end of the concentric shaft 3 are connected by a drive belt 5. As a result, the power of the prime mover 4 can be transmitted as a rotational driving force to the concentric shaft 3 via the drive belt 5, and as a result, the pair of rotary drums 1 and 2 are rotated in conjunction with each other at a predetermined rotational speed. be able to. That is, the belt pulley 3a, the prime mover 4, the belt pulley 4a, and the drive belt 5 constitute a drive mechanism that rotates the pair of rotating drums 1 and 2.

  In FIG. 1, one prime mover 4 is arranged at an oblique upper portion so as to be equidistant from two adjacent pairs of rotating drums, and the two prime movers 4 drive the two cutting devices 20. Although it is configured, it is not limited to such a configuration, and a single prime mover 4 may be provided for a pair of rotating drums 1, 2, or three or more adjacent rotating drums 1, One prime mover 4 may be provided for two. Further, the driving force transmission method is not limited to the driving belt described above, and a gear method, a direct driving method, or the like may be adopted.

  Furthermore, it is preferable that at least one of the pair of rotating drums 1 and 2 is attached to the concentric shaft 3 via a one-way clutch. This one-way clutch allows the rotating drum to rotate in the direction of winding the wire W relative to the concentric shaft 3. For example, when the one-way clutch is attached to the rotating drum 1, the rotating drum 1 is concentric. It is possible to rotate in the direction of winding the wire W around the shaft 3 (that is, counterclockwise in FIG. 1). Thereby, the initial wire slack that tends to occur when the wire W is wound around the rotary drums 1 and 2 in the preparation stage can be efficiently removed, and the preparatory work before starting the cutting device 20 is performed quickly and efficiently. It becomes possible.

  Both ends of a single wire W are wound around the pair of rotating drums 1 and 2 respectively. Specifically, one end of one wire W is engaged with the rotating drum 1, and the other end is engaged with the rotating drum 2. As shown in FIG. 1, a wire W is wound around the rotating drum 1 so as to extend downward from the right side of the drum when viewed from the front, and the rotating drum 2 extends downward from the left side of the drum. The wire W is wound so as to come out.

  As a result, the rotational direction of the rotational force applied to the pair of rotating drums 1 and 2 by the tension acting on the wire W traveling on the traveling path from the one of the pair of rotating drums 1 and 2 to being wound around the other. Can be reversed on one rotating drum side from which the wire is drawn and on the other rotating drum side from which the wire is wound. Therefore, it is possible to almost cancel the rotational moment due to the tension with respect to the concentric shafts of the pair of rotating drums 1 and 2. That is, on the paper surface of FIG. 1, the rotating drum 1 is applied with a clockwise tension, and the rotating drum 2 is applied with a counterclockwise tension.

  Since a steel wire such as a piano wire, high-strength fiber, or the like is preferably used for the wire W, as a method of engaging the wire W to the pair of rotating drums 1 and 2, for example, an end portion of the wire W After attaching the stopper to the crimping process with a caulking jig or the like, a method of engaging the stopper with a slit or recess provided in advance on the rotating drum, or a screw provided with a through hole in the head For example, a method of inserting and fixing the end of the wire W into the through hole and then screwing the screw into the screw hole of the rotary drum can be used.

  The length of the wire W only needs to be long enough to continuously cut the semi-plastic body M for a predetermined time. For example, the wire W is directed in one direction from one rotating drum to the other rotating drum. When the semi-plastic body M is cut only by traveling, a predetermined size is required before all the wires W are drawn from one rotating drum on which almost all of the wires W are wound except for the traveling path. It is desirable that the wire W has such a length that can be cut from end to end of the semi-plastic body M having.

  Next, each pulley that defines the first travel path from the rotating drum 1 to the folding pulley 12 will be described. A guide pulley 6 is provided below the rotary drum 1. The rotating shaft of the guide pulley 6 is rotatably supported by the middle horizontal bar 30c of the frame 30 so as to be substantially parallel to the concentric shaft 3 described above, and the wire W extending from the rotating drum 1 travels. Is guiding.

  An alignment pulley 7 is provided below the guide pulley 6. The rotation axis of the alignment pulley 7 is rotatably supported by a support portion 30d attached to the middle horizontal bar 30c so as to be horizontal and orthogonal to the concentric shaft 3. Thereby, the shift in the direction of the concentric axis 3 of the wires W extending from the rotary drums 1 and 2 provided back and forth in the direction of the concentric axis 3 is aligned, and the semi-plastic body M in the first traveling path is aligned. Both the cutting area and the cutting area of the semi-plastic body M in the second travel path described later can be arranged on a plane parallel to the paper surface of FIG.

  A turning pulley 8 for turning the wire W sent from the aligning pulley 7 toward a tension pulley 9 described later, below the aligning pulley 7 and in front of the aligning pulley 7 in FIG. 1, and a semi-plastic body First and second positioning pulleys 10 and 11 that define a cutting region of M are arranged in this order from the top to the bottom on the vertical line. The rotation center axis of the turning pulley 8, the first and second positioning pulleys 10 and 11 is substantially parallel to the rotation center axis of the alignment pulley 7, and the turning pulley 8 and the first positioning pulley 10 are connected to the support 30d by the second pulley. The positioning pulley 11 is rotatably supported by the lower horizontal bar 30b.

  The tension pulley 9 is located on the back side of the drawing surface of FIG. 1 as compared with the turning pulley 8 and the first positioning pulley 10, and can apply tension to the wire W. Specifically, the tension pulley 9 is rotatably attached to the tip of the piston rod of the air cylinder 9a disposed in the support portion 30d so as to pull the wire W toward the back side in the drawing of FIG. Thereby, desired tension | tensile_strength can be provided to the wire W by adjusting the air pressure of the air cylinder 9a suitably. That is, the tension applying mechanism is constituted by the tension pulley 9 and the air cylinder 9a. In addition to the above-described air cylinder 9a, a structure using an elastic body such as a spring as a constituent member may be adopted as the structure of the tension applying mechanism.

  As described above, the first positioning pulley 10 and the second positioning pulley 11 are pivotally supported by the support portion 30d and the lower horizontal bar 30b, respectively, and halfway between the two positioning pulleys that are vertically opposed to each other. A cutting region where the plastic body M is cut is defined. That is, by passing the semi-plastic body M between the lower horizontal bar 30b and the middle horizontal bar 30c to which the support portion 30d is attached, the traveling wire W is pressed against the semi-plastic body M, thereby The plastic body M can be cut.

  A folding pulley 12 that folds the wire W fed from the second positioning pulley 11 toward the second travel path is provided obliquely below the second positioning pulley 11. The center line of rotation of the folding pulley 12 is rotatably supported by the lower horizontal bar 30b so as to be parallel to the rotating shaft 3 and on the lower side in the vertical direction. Thus, the direction of the wire W before being folded back by the folding pulley 12 and the wire W after being folded back can be changed by about 180 degrees.

  The wire W folded back by the folding pulley 12 then reaches the rotating drum 2 through a pulley group similar to the pulley group that defines the first traveling path described above except for the alignment pulley 7. That is, the second travel path defined by the guide pulley 6, the turning pulley 8, the tension pulley 9, the first positioning pulley 10 and the second positioning pulley 11 is the rotating shaft 3 of the pair of rotating drums 1 and 2. And a plane passing through the rotation center line of the return pulley 12 is substantially symmetric with respect to the first travel path excluding the travel path from the rotating drum 1 to the turning pulley 8.

  With such a configuration, the wire W before being folded back by the folding pulley 12 and the wire W after being folded are compared with each other in the cutting region where the semi-plastic body M is cut. It is possible to run in parallel and spaced apart from each other when viewed from the traveling direction. As a result, it is possible to cut two locations at once with one wire W with respect to the semi-plastic body M that moves relative to each other, and the efficiency of the cutting work can be increased.

  Next, the operation of the cutting device 20 of the above-described embodiment will be described by taking as an example a case where the wire W is pulled out from the rotating drum 1 and wound around the rotating drum 2. First, almost all of the wires W that are engaged with the pair of rotating drums 1 and 2 at both ends are wound around the rotating drum 1. At this time, the wire W is made to hang over the pulley group which demarcates the first and second travel paths. In this state, the air cylinder 9 a is activated so that a predetermined tension is applied to the wire W through the tension pulley 9. Subsequently, the prime mover 4 is started and the pair of rotating drums 1 and 2 are rotated clockwise on the paper surface of FIG.

  With the rotation of the pair of rotating drums 1 and 2, the wire W wound around the rotating drum 1 is sent out, and the guide pulley 6, the alignment pulley 7, the turning pulley 8, the tension pulley 9, and the first positioning pulley 10. The second positioning pulley 11 travels in the order of the first travel path and is then folded back by the folding pulley 12, and then the second positioning pulley 11, the first positioning pulley 10, the tension pulley 9, and the turning pulley 8. And after driving | running | working the 2nd driving | running route in order of the guide pulley 6, it is wound up by the rotating drum 2 which is a winding side drum.

  At the same time, the semi-plastic body M indicated by the chain line in FIG. 2 is fed toward the frame body 30 in the direction of the arrow, or the frame body 30 is fed toward the semi-plastic body M. By the relative movement between the semi-plastic body M and the frame body 30, the traveling wire W is pressed against the semi-plastic body M to cut the semi-plastic body M over the entire length in the moving direction. When the semi-plastic body M is fed toward the stationary frame 30, for example, the semi-plastic body M is placed on a moving means such as a carriage movable in the arrow direction in FIG. Move it.

  On the contrary, when the frame body 30 is fed toward the semi-plastic body M in a stationary state, the semi-plastic body M is placed on a fixed support base, and the arrow of FIG. The frame 30 may be mounted on a moving means such as a carriage that can move in the opposite direction, and moved in a direction opposite to the arrow at a predetermined speed. In any case, it is preferable that the placement portion of the semi-plastic body M is cut out, for example, in a comb shape so that the traveling wire W does not contact.

  The traveling speed of the wire W is preferably equal to or more than 10 times the relative moving speed of the semi-plastic body M and the wire W. When the traveling speed of the wire W is slower than the relative movement speed of the semi-plastic body M and the wire W, the effect of smoothing the cut surface is reduced. On the other hand, if it is faster than 10 times, the required length of the wire W becomes too long and it is not practical.

  After the cutting of the semi-plastic body M is completed and most of the wire W drawn from the rotating drum 1 is wound on the rotating drum 2, the pair of rotating drums 1 and 2 are rotated counterclockwise on the paper surface of FIG. The semi-plastic body M can be cut while the wire W wound around the rotating drum 2 is run from the rotating drum 2 toward the rotating drum 1. Thereby, the tact time can be shortened. Alternatively, the semi-plastic body M may be cut again under the same conditions after the wire W wound around the rotary drum 2 is once rewound onto the rotary drum 1.

  As described above, in the cutting device 20 according to the embodiment of the present invention, the rotating drums 1 and 2 that respectively feed and wind the wire W are arranged on the concentric shaft 3, so that these rotating drums 1 and 2 are arranged. Therefore, it is not necessary to separately arrange the rotating shafts for rotating the motor, thereby simplifying the rotating mechanism, reducing the number of prime movers installed, improving the energy consumption efficiency, and reducing the manufacturing cost.

  Further, the rotational direction of the rotational force applied to the rotary drums 1 and 2 by the tension acting on the wire W can be reversed between the wire W side to be fed and the wire W side to be wound. Therefore, the rotational moments caused by these tensions can be substantially canceled with respect to the concentric shafts 3 of the rotary drums 1 and 2. As a result, the energy consumption efficiency for running the wire W can be further improved, and the rotary drums 1 and 2 can be driven to rotate by the prime mover 4 with small power. Furthermore, since the operation control basically needs only forward rotation and reverse rotation of the prime mover 4, the control system of the prime mover can be simplified.

  In addition, as shown in FIG. 1, even when the semi-plastic body M is cut at once with a plurality of wires W using a plurality of cutting devices 20, it is possible to uniformly apply tension to each wire W. Thus, it is possible to prevent problems such as breakage of the wire W due to the difference in the tension of the wire W and the appearance appearance of the cut surface of the semi-plastic body M being impaired. Further, it is possible to individually apply tension to each wire W, and it is possible to easily adjust the tension state of each wire W.

  Further, the semi-plastic body M is cut by pressing the wire W against the semi-plastic body M while relatively moving the wire W and the semi-plastic body M while the wire W is traveling in one direction. Since the wire W at a constant speed is always pressed against the portion, the standing, uneven pattern, and cutting that may occur when the wire W is temporarily stopped when the wire W is cut while reciprocating. Periodic wire marks on the surface can be reliably prevented.

  The present invention is not limited to the above-described embodiment, and the components of the above-described embodiment are partially changed or other components are added within the scope of the gist of the present invention. Or, a part of a component that is converted into a superordinate concept within a range where the same effect can be obtained is also included. For example, the following modifications are also included in the present invention.

  That is, in the above-described embodiment, the wire W and the semi-plastic body M are relatively moved while traveling in one direction from one of the pair of rotating drums 1 and 2 toward the other drum. However, the direction of rotation of the concentric shaft 3 of the pair of rotating drums 1 and 2 is alternately switched continuously, and the wire W is reciprocated along its travel route. You may cut | disconnect by moving W and the semiplastic body M relatively.

  The portion that causes the wire W to reciprocate is not a heavy cutting device main body, but is basically simplified or reduced in weight by providing the pair of rotating drums 1 and 2 on the concentric shaft 3 as described above. Since only the pulley group including the rotating drums 1 and 2 can be used, even if the rotation direction is switched alternately, a simple mechanism can be used. Further, it is not necessary to reinforce the frame body 30 on which these pulley groups are mounted, and the length of the wound wire W may be shortened, so that the entire apparatus can be simplified. In other words, it can be introduced without requiring significant modification of existing production lines and buildings.

  In addition, since the movable part of the device is small and lightweight, the reciprocating cycle of the wire can be easily accelerated without increasing the size of the device, and it is easy simply by increasing the rotation angle of the rotating drums 1 and 2 in each cycle. Moreover, the stroke of the reciprocating travel of the wire can be lengthened. Therefore, it is possible to easily obtain a smoother cut surface.

  The travel speed suitable for the wire W and the stroke of the reciprocating travel vary to some extent depending on the relative speed between the semi-plastic body M and the frame body 30. The faster the reciprocating cycle, the better. However, in general, it is desirable to set the cycle to about 1 cycle for the relative movement distance of 2 mm to 10 mm between the semi-plastic body M and the frame body 30. The reciprocating stroke is appropriately set according to the apparatus configuration, but is generally preferably as long as possible, and is more preferably 10 mm or more in order to obtain a smoothing effect.

  In the above-described embodiment, the pulley group is configured such that the wire W before and after being folded by the folding pulley 12 is in a positional relationship in which the wires W are separated from each other when viewed from the relative movement direction of the semi-plastic body M and the wire W. However, the pulley group is arranged so that the wire W before being folded back by the folding pulley 12 and the wire W after being folded are positioned on the same line when viewed from the relative movement direction of the semi-plastic body M and the wire W. You may arrange. Thereby, since it becomes possible to pass the wire W which travels in the opposite direction to the wire W which performed the said cutting | disconnection between both the cut surfaces cut | disconnected by the wire W, a smoother cut surface is obtained. Can do.

  In order to position both the wires W before and after folding on the same line, the pulley group defining the first and second traveling paths including the rotating drums 1 and 2 and the folding pulley 12 is entirely removed from the position of the above-described embodiment. What is necessary is just to rotate 90 degree | times to a horizontal direction. That is, the relative traveling direction of the traveling wire W and the semi-plastic body M may be orthogonal to the surface including the concentric shaft 3 of the rotating drums 1 and 2 and the rotating shaft of the folding pulley 12.

  At this time, the wire W may run in one direction from one of the pair of rotating drums 1 and 2 to the other drum, or the concentric shaft 3 of the pair of rotating drums 1 and 2 The wire W may be reciprocated by alternately switching the rotation direction alternately. Further, the tension of the wire W may be applied individually by the tension pulley 9 or the like for each of the first travel path before the return and the second travel path after the return.

DESCRIPTION OF SYMBOLS 1, 2 Pair of rotating drums 3 Concentric shaft 4 Motor 5 Drive belt 6 Guide pulley 7 Alignment pulley 8 Turning pulley 9 Tension pulley 9a Air cylinder 10 First positioning pulley 11 Second positioning pulley 12 Folding pulley 20 Cutting device 30 Frame W Wire M Semi-plastic

Claims (7)

  A cutting apparatus for cutting a semi-plastic body by relatively moving a semi-plastic body and a wire, and having a pair of rotating drums provided on a concentric shaft and a pair of rotating drums with both ends thereof A wire wound and wound, a folding pulley that folds the wire drawn from one rotary drum of the pair of rotary drums toward the other rotary drum, and the drawn wire of the semi-plastic body A semi-plastic cutting apparatus comprising: a positioning pulley that leads to a cutting region where cutting is performed; and a tension applying mechanism that applies a predetermined tension to the drawn wire.   The half wire according to claim 1, wherein the wire before being folded back by the folding pulley and the wire behind are separated from each other when viewed from a relative movement direction of the semi-plastic body and the wire. Plastic body cutting device.   The semi-plastic body cutting device according to claim 1 or 2, wherein the semi-plastic body is cut while the wire runs in a certain direction by the pair of rotating drums rotating in one direction.   The semi-plastic body cutting device according to claim 1 or 2, wherein the semi-plastic body is cut while the wire is reciprocated by the pair of rotating drums whose rotation directions are alternately switched.   The wire before and after the folding by the folding pulley are located on the same line when viewed from the relative movement direction of the semi-plastic body and the wire. Semi-plastic cutting device. At least one of the rotary drum of the pair, characterized in that the rotating drum in the direction of taking-out winding the wire is rotatably supported via a one-way clutch that allows rotation, to claim 3 The semi-plastic body cutting device as described.   The semi-plastic cutting apparatus according to any one of claims 1 to 6, wherein the pair of rotating drums are detachably supported by the concentric shaft.

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